Coherent light generators – Particular beam control device – Having particular beam control circuit component
Patent
1988-09-02
1989-10-03
Sikes, William L.
Coherent light generators
Particular beam control device
Having particular beam control circuit component
372 33, 372 38, H01S 313
Patent
active
048721735
ABSTRACT:
In a method and apparatus for stabilizing the emission spectrum of a semiconductor laser diode, an external optical cavity is coupled to the laser diode to couple light from an active region of the laser diode to the external cavity and from the external cavity to the active region of the laser diode. The phase of light coupled from the external cavity to the active region of the laser diode is dithered about a phase operating point at a dither frequency. A component of the forward voltage across the laser at the dither frequency is sensed and a feedback signal indicative of the amplitude of said component of the forward voltage and the phase of said component of the forward voltage relative to the phase of the dither is generated. The phase operating point is changed in response to the feedback signal to minimize the amplitude of said component of the forward voltage. The method and apparatus are useful for stabilization of laser diodes used in high performance optical communications systems.
REFERENCES:
patent: 3466565 (1969-09-01), Rigrod
patent: 3524147 (1970-08-01), Soffer et al.
patent: 3899748 (1975-08-01), Bodlaj
patent: 3965440 (1976-06-01), Graves
patent: 4019159 (1977-04-01), Hon et al.
patent: 4237427 (1980-12-01), Holland
patent: 4450565 (1984-05-01), Copeland
patent: 4680769 (1987-07-01), Miller
patent: 4683573 (1987-07-01), Albanese
patent: 4720163 (1988-01-01), Goodwin et al.
patent: 4819240 (1989-04-01), Takiguchi et al.
Acket et al., IEEE J. Quantum Electron., 1984, QE-20, pp. 1163-1169.
Tkach et al., IEEE J. Lightwave Technology, 1986, LT-4, pp. 1655-1661.
Favre et al., "Autostability Technique for Achieving Highly Stable Resonant Optical Feedback in a Fibre Resonator" Electron. Lett., 1983, vol. 19, pp. 1046-1048.
Ho et al., "Optical Feedback Phase-Autolocking of a Semiconductor Laser", Third International Conference on Optical Fiber Sensors, San Diego, 13--14, Feb. 1985.
Neilsen et al., J. Opt. Commun., 1984, p. 41, "Linewidth Stabilization of Semiconductor Lasers in an External Cavity".
Jain et al., Electron. Lett., vol. 21, pp. 957-958; "Stabilization of External Optical Feedback Phase in a Semiconductor Laser."
Holloway B. R. R.
Junkin C. W.
Northern Telecom Limited
Sikes William L.
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